initial buildroot for linux 5.15

package/hwloc/Config.in

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+config BR2_PACKAGE_HWLOC
+	bool "hwloc"
+	depends on BR2_TOOLCHAIN_HAS_THREADS
+	help
+	  Portable Hardware Locality
+
+	  Provides a portable abstraction (across OS, versions,
+	  architectures, ...)  of the hierarchical topology of modern
+	  architectures, including NUMA memory nodes, sockets, shared
+	  caches, cores and simultaneous multithreading.
+
+	  http://www.open-mpi.org/projects/hwloc/
+
+comment "hwloc needs a toolchain w/ threads"
+	depends on !BR2_TOOLCHAIN_HAS_THREADS

package/hwloc/hwloc.hash

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+# From https://www.open-mpi.org/software/hwloc/v2.4/
+sha256  392421e69f26120c8ab95d151fe989f2b4b69dab3c7735741c4e0a6d7de5de63  hwloc-2.4.1.tar.bz2
+# Locally computed
+sha256  d79a936a42f3c6cb7c8375a023d43f4435f4664d3a5a2ea6b4623cff83c7fc06  COPYING

package/hwloc/hwloc.mk

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+################################################################################
+#
+# hwloc
+#
+################################################################################
+
+HWLOC_VERSION_MAJOR = 2.4
+HWLOC_VERSION = $(HWLOC_VERSION_MAJOR).1
+HWLOC_SOURCE = hwloc-$(HWLOC_VERSION).tar.bz2
+HWLOC_SITE = https://download.open-mpi.org/release/hwloc/v$(HWLOC_VERSION_MAJOR)
+HWLOC_LICENSE = BSD-3-Clause
+HWLOC_LICENSE_FILES = COPYING
+HWLOC_DEPENDENCIES = host-pkgconf
+HWLOC_INSTALL_STAGING = YES
+HWLOC_SELINUX_MODULES = hwloc
+
+# ac_cv_prog_cc_c99 is required for BR2_USE_WCHAR=n because the C99 test
+# provided by autoconf relies on wchar_t.
+HWLOC_CONF_ENV = ac_cv_prog_cc_c99=-std=gnu99
+
+HWLOC_CONF_OPTS = \
+	--disable-opencl \
+	--disable-cuda \
+	--disable-nvml \
+	--disable-gl \
+	--disable-cairo \
+	--disable-doxygen
+
+ifeq ($(BR2_PACKAGE_HAS_UDEV),y)
+HWLOC_CONF_OPTS += --enable-libudev
+HWLOC_DEPENDENCIES += udev
+else
+HWLOC_CONF_OPTS += --disable-libudev
+endif
+
+ifeq ($(BR2_PACKAGE_LIBPCIACCESS),y)
+HWLOC_CONF_OPTS += --enable-pci
+HWLOC_DEPENDENCIES += libpciaccess
+else
+HWLOC_CONF_OPTS += --disable-pci
+endif
+
+ifeq ($(BR2_PACKAGE_LIBXML2),y)
+HWLOC_CONF_OPTS += --enable-libxml2
+HWLOC_DEPENDENCIES += libxml2
+else
+HWLOC_CONF_OPTS += --disable-libxml2
+endif
+
+ifeq ($(BR2_PACKAGE_NCURSES),y)
+HWLOC_DEPENDENCIES += ncurses
+endif
+
+ifeq ($(BR2_PACKAGE_NUMACTL),y)
+HWLOC_DEPENDENCIES += numactl
+endif
+
+$(eval $(autotools-package))